arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c

   1 /* linux/arch/arm/plat-s5pc1xx/setup-sdhci-gpio.c
   2  *
   3  * Copyright 2009 Samsung Eletronics
   4  *
   5  * S5PC1XX - Helper functions for setting up SDHCI device(s) GPIO (HSMMC)
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10 */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/types.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/io.h>
  17 #include <linux/gpio.h>
  18 #include <linux/mmc/host.h>
  19 #include <linux/mmc/card.h>
  20
  21 #include <plat/gpio-cfg.h>
  22 #include <plat/regs-sdhci.h>
  23
  24 void s5pc100_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
  25 {
  26         unsigned int gpio;
  27         unsigned int end;
  28         unsigned int num;
  29
  30         num = width;
  31         /* In case of 8 width, we should decrease the 2 */
  32         if (width == 8)
  33                 num = width - 2;
  34
  35         end = S5PC100_GPG0(2 + num);
  36
  37         /* Set all the necessary GPG0/GPG1 pins to special-function 0 */
  38         for (gpio = S5PC100_GPG0(0); gpio < end; gpio++) {
  39                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  40                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  41         }
  42
  43         if (width == 8) {
  44                 for (gpio = S5PC100_GPG1(0); gpio <= S5PC100_GPG1(1); gpio++) {
  45                         s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  46                         s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  47                 }
  48         }
  49
  50         s3c_gpio_setpull(S5PC100_GPG1(2), S3C_GPIO_PULL_UP);
  51         s3c_gpio_cfgpin(S5PC100_GPG1(2), S3C_GPIO_SFN(2));
  52 }
  53
  54 void s5pc100_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
  55 {
  56         unsigned int gpio;
  57         unsigned int end;
  58
  59         end = S5PC100_GPG2(2 + width);
  60
  61         /* Set all the necessary GPG2 pins to special-function 2 */
  62         for (gpio = S5PC100_GPG2(0); gpio < end; gpio++) {
  63                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  64                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  65         }
  66
  67         s3c_gpio_setpull(S5PC100_GPG2(6), S3C_GPIO_PULL_UP);
  68         s3c_gpio_cfgpin(S5PC100_GPG2(6), S3C_GPIO_SFN(2));
  69 }
  70
  71 void s5pc100_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
  72 {
  73         unsigned int gpio;
  74         unsigned int end;
  75
  76         end = S5PC100_GPG3(2 + width);
  77
  78         /* Set all the necessary GPG3 pins to special-function 2 */
  79         for (gpio = S5PC100_GPG3(0); gpio < end; gpio++) {
  80                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  81                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  82         }
  83
  84         s3c_gpio_setpull(S5PC100_GPG3(6), S3C_GPIO_PULL_UP);
  85         s3c_gpio_cfgpin(S5PC100_GPG3(6), S3C_GPIO_SFN(2));
  86 }